US1467911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen detector
Assignee: Individual
•
Filing: 1920-03-31
•
Granted: 1923-09-11
•
Expires: 1940-03-31
Abstract
No abstract record available.
Inventors
- 👤 Arendt Morton
- 👤 Edward V Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:19
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/20; G01N25/22; G01N25/28; G01N25/34; G01N25/36; Y; Y10; Y10S; Y10S200/00; Y10S200/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1926-09-10 | 1927-03-12 | 1927-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-09-10 | 1931-03-12 | 1931-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-09-10 | 1935-03-12 | 1935-09-11 | $7700.00 | Window Closed / Lapsed |